That part of a ship's hull or bottom which is broadest and most nearly flat, and on which she would rest if aground.

3.

Bilge water.

Bilge freeNaut., stowed in such a way that the bilge is clear of everything; -- said of a cask. -- Bilge pump, a pump to draw the bilge water from the hold of a ship. -- Bilge waterNaut., water which collects in the bilge or bottom of a ship or other vessel. It is often allowed to remain till it becomes very offensive. -- Bilge ways, the timbers which support the cradle of a ship upon the ways, and which slide upon the launching ways in launching the vessel.